[s-cars] B6 S4 4.2l engine vibration

[John Cody Forbes]

Today I took the car for a drive. I ran it up to 50mph (shifting at 1800rpm... the torque this thing has is pretty fun), then shut the engine off while in gear. The vibration continued. So that completely rules out any sort of running issue. 

Based on responses and what I've found I am convinced it's a bad flywheel. Ill keep everybody posted.

-Cody (mobile)

On Nov 12, 2010, at 12:01 AM, John Cody Forbes <cody at 5000tq.com> wrote:

> Got an S4 in the shop today with a __horrible__ vibration. It is 100% engine related, is not effected by clutch position nor road speed. Noticeable at idle and get worse as you increase revs, so much so that I am afraid to take it beyond 2000rpm. It is not a misfire, engine runs well. No CEL. Everything on the front of the engine looks ok, harmonic balancer runs true, etc.
> 
> The only thing I can think of is that the dual mass flywheel center bearing let go and the clutch side of the flywheel is off center. Obviously the cost of being wrong about that is significant.
> 
> Any ideas/input/btdt?
> 
> -Cody (mobile)
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